Validity of the myotest® in measuring force and power production in the squat and bench press
Date of Original Version
Comstock, BA, Solomon-Hill, G, Flanagan, SD, Earp, JE, Luk, H-Y, Dobbins, KA, Dunn-Lewis, C, Fragala, MS, Ho, J-Y, Hatfield, DL, Vingren, JL, Denegar, CR, Volek, JS, Kupchak, BR, Maresh, CR, and Kraemer, WJ. Validity of the myotest® in measuring force and power production in the squat and bench press. J Strength Cond Res 25(8): 2293-2297, 2011-The purpose of this study was to verify the concurrent validity of a bar-mounted Myotest® instrument in measuring the force and power production in the squat and bench press exercises when compared to the gold standard of a computerized linear transducer and force platform system. Fifty-four men (bench press: 39-171 kg; squat: 75-221 kg) and 43 women (bench press: 18-80 kg; squat: 30-115 kg) (age range 18-30 years) performed a 1 repetition maximum (1RM) strength test in bench press and squat exercises. Power testing consisted of the jump squat and the bench throw at 30% of each subject's 1RM. During each measurement, both the Myotest® instrument and the Celesco linear transducer of the directly interfaced BMS system (Ballistic Measurement System [BMS] Innervations Inc, Fitness Technology force plate, Skye, South Australia, Australia) were mounted to the weight bar. A strong, positive correlation (r) between the Myotest and BMS systems and a high correlation of determination (R 2) was demonstrated for bench throw force (r = 0.95, p < 0.05) (R 2 = 0.92); bench throw power (r = 0.96, p < 0.05) (R 2 = 0.93); squat jump force (r = 0.98, p < 0.05) (R 2 = 0.97); and squat jump power (r = 0.91, p < 0.05) (R 2 = 0.82). In conclusion, when fixed on the bar in the vertical axis, the Myotest is a valid field instrument for measuring force and power in commonly used exercise movements. © 2011 National Strength and Conditioning Association.
Journal of Strength and Conditioning Research
Comstock, Brett A., Glenn Solomon-Hill, Shawn D. Flanagan, Jacob E. Earp, Hui Ying Luk, Kathryn A. Dobbins, Courtenay Dunn-Lewis, Maren S. Fragala, Jen Yu Ho, Disa L. Hatfield, Jakob L. Vingren, Craig R. Denegar, Jeff S. Volek, Brian R. Kupchak, Carl M. Maresh, and William J. Kraemer. "Validity of the myotest® in measuring force and power production in the squat and bench press." Journal of Strength and Conditioning Research 25, 8 (2011): 2293-2297. doi:10.1519/JSC.0b013e318200b78c.